HARRISBURG, Pa. (AP) – Gov. Tom Wolf is being urged by a top Senate Democrat to stick by his nominee for state police commissioner following the discovery of a racist letter in Col. Marcus Brown’s home mailbox.

Philadelphia Sen. Vincent Hughes said Wednesday that the letter is unacceptable. It comes amid an increasingly ugly battle over Brown’s nomination.

Hughes says the letter refers to Brown’s commitment to recruiting minorities. He says that’s of great concern because the percentage of non-white troopers has dropped to 6 percent from 20 percent in 1999.